Axino dark matter with R-parity violation and 130 GeV gamma-ray line

Motoi Endo, Koichi Hamaguchi, Seng Pei Liew, Kyohei Mukaida, Kazunori Nakayama

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)


We show that decaying axino dark matter with R-parity violation can explain the observed excess of the 130 GeV gamma-ray line from the Galactic center in the Fermi data. The branching fraction of the axino decay into monochromatic photons can be O(1), and constraints from continuum gamma-rays and the anti-proton flux are ameliorated. The Pecce-Quinn scale of O(1013-1014) GeV and the R-parity violation parameter of O(10-12-10-11) are cosmologically favored.

Original languageEnglish
Pages (from-to)111-117
Number of pages7
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Issue number1-3
Publication statusPublished - 2013 Apr 10
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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